Readme files from the last Thor's distribution

Taken from this file http://tron.homeunix.org/ja2/ja2-0.12.1-ENGLISH.zip
Updated changelog and user documentation
Prepare cross-platform MinGW build

Now we have everything necessary in place to build
Windows distribution on Linux machine.

Use: make build-win-release-on-linux
Merge branch 'dev/preparing-distro'
Update build instructions and Makefile
Checking compilation on Mac OS and updating build instructions
By default don't load game resources from the bundle on Mac OS

Now by default do the same as on other platforms - read path to the resources
from the configuration file and use it to load resources.

Loading resources from the bundle on Mac OS was added in this commit:

> commit a3ea537551e3d0f9aee3b755321fc3fc31841070
> Author: tron <tron@5e31c081-6ce3-0310-bb30-f584a8092234>
> Date:   Mon Apr 14 08:33:57 2008 +0000
>
>     For OSX get the path to the game data from the bundle.
>     Initial patch by: Erik Broström
>
>     git-svn-id: svn://tron.homeunix.org/ja2/trunk@3757 5e31c081-6ce3-0310-bb30-f584a8092234
Xcode solution to build the project on Mac OS

Tested on Mac OS 10.6.8, Xcode 4.2

SDL development library have to be installed separately.
See COMPILATION.txt on how to build it from sources.